Does anyone remember Webvan ?
Or I am the oldest
Does anyone remember Webvan ?
Or I am the oldest
The man is 94 and still active. I remember Hans Bethe's colloquium when he was 94. I tip my hat to these people, they keep on going strong long after they made their major contributions to their fields.
On Aurora and Solaria life expectancy has hit 350 and nobody seems to worry about it.
You just have to sample a large enough number of environments (please note, environments, not people) and you may find out that "some" != "few" either. In large cities you are very likely to find people on their phones most of the time, but large cities are not all there is.
As for cars, when I lived in a small town in North America I had to buy a car. I was too restricted without one. When I lived in a large European city with good public transportation I did not drive a car in more than 10 years. Cars are enablers (allow you to get quickly from one place to another), but in some places there are alternative enablers, like public transportation. I am expected to use one or the other, so I cannot tell the boss that I will walk to work.
If you don't like the phone example take the example of a trans-Atlantic trip. Will your boss agree for you to spend 5 days one way by ship, and another 5 days on the way back or will she/he tell you to get on a plane ?
The enabler (plane) has shifted the expectation (the length of the trip reduced from 5 days to 8 hours one way)
I stopped reading when I saw: "Now that the world has become addicted to portable electronics
Not one of these authors mention the fact that many people will gladly do without portable electronics, but they have not choice but to use them.
The fact that mobile phones are affordable, almost all populated areas have coverage and they enable people to get in touch at any moment, brings the _expectation_ that everyone has a cell phone with then and can be contacted at any moment.
Let's say you live in a large city and you tell your boss "I will check with you when I get to a public phone".
Will your boss tell you "OK, check with me when you get to a public phone", or "Get a cell phone" ?
... assholes appeared only in recent times. Back then creatures were more civilized.
The scourges passed the world shrinks,
For a long time peace and populated lands:
One will travel safely by air, land, sea and wave,
Then the wars stirred up anew. (C I â" 63)
They will think they have seen the Sun at night
When they will see the pig half-man:
Noise, song, battle, fighting in the sky perceived,
And one will hear brute beasts talking. (C I â" 64)
... such that it would be amenable to have a simple, self-contained explanation. He avoided the more hairy subjects.
He did not go over the structure of the proton, or QCD and try to make those accessible.
And for the more accessible subjects other physicists have done a great job at explaining them as well. Landau and Kitaigorodsky come to mind.
The problems appear when people with no technical background make the decision of which language to use for a particular project. They base their decision on what they heard from friends or on the latest buzzwords. For example Scala is now imposed on some projects simply because of the word going around that it is the latest and greatest thing.
Experienced developers have already agreed that C++ is great for writing libraries. Personally I use it because I can do everything I need with one language. Handling large data trees, SSE optimizations, OpenGL graphics, all in the same language, but these are all one-person projects.
Go to any large organization and look at a C++ code base developed over 20 years by a team of kept to a size of about 50 developers, when each developer spent an average of 2 years on the job. After a while you can identify what different developers tried to learn on the job.
By the way, I saw similar code bases, but developed in Java. They look just as bad as the C++ ones, and the managed environment which prevents crashes makes the bugs more difficult to find.
... when he shot the stag in the head with the cherry kernels, right between the antlers. A year later he saw the stag again with a beautiful cherry tree growing out of its head.
They should hire him.
It will teach commandos how to hitch a ride on a cannon shell too.
... against Ortnoks and Sheevars. Floaters and Snakemen are obsolete.
I am ashamed of my code !
My code is an abomination that must be ejected from the visible universe !
We must send a message that will pass through the Big Crunch that will alert future universes that my code should not exist in any possible future !
I am so ashamed.
The problem with relying on the timing of the pulses is dispersion of the wave packet in interstellar space. Keep in mind that these signals travel hundreds of light years trough interstellar space, which is by no means a perfect vacuum.
Sometimes entire pulses are missing from the signal. Pulsar study groups use computer clusters for the sole purpose of reconstructing the original form of the pulse. For example, the one at McGill Univ. was student-built, but it made it to the (bottom of the) Top 500 list at the time it was built.
A spacecraft has very limited computing power, certainly not of the magnitude required to reconstruct pulses. The signal is very dirty, it would be a bad idea to rely on its timing. The pulses are very regular, "when the signal is good".
Pulsar navigation may allow to determine the direction in which the spacecraft is traveling, but not the actual distance from Earth, unless the spacecraft has traveled very large distances.
A simple example. Last time I checked, Voyager1 was 18 light-hours away from Earth. Now Alpha Centauri is 4 light-years away. Multiply 4 by 365 and then by 24 and divide by 18.
That tells us that Alpha Centauri is about 2000 times more distant than Voyager1.
Put two dots on a blackboard, 2 meters apart. The dots represent Earth and Alpha Centauri. Then Voyager1, the spacecraft that has traveled farthest from Earth, is a full 1 millimeter away from the Earth point.
The closest pulsar to Earth is at an estimated distance of about 250 light-years. The pulsars will be very useful to find the direction, but for distance timing radio signals from Earth to the spacecraft remains the best method.
It is well known that chess players try to unsettle their opponents before important matches, and a world championship match is as big as it gets.
However, capitalizing on the fact that the opponent is Russian, the match is played in New York, the fact that it starts immediately after the presidential elections, and that there was a lot of noise about Russia hacking US servers, is quite low.
Well below what is expected from a reigning Chess World Champion.
(1) Never draw what you can copy. (2) Never copy what you can trace. (3) Never trace what you can cut out and paste down.